Remote control switch



Feb. 9, 1932. F. J. SORELL REMOTE CONTROL SWITCH Filed Dec. 27, 1926 16I v J J8 Q t v 32 i gxia 6 g Patented Feb. 9, 1932 FRANKLIN J. SORELL,OF CHATTANOOGA, TENNESSEE REMOTE CONTROL swrrcn Application filedDecember 27, 1926. Serial No. 157,259.

This invention relates to a remote control switch for controllingdistant electric translating devices, especially adapted for closing thecircuit between a radio receiving set and its A-battery, but of use inany distant control circuit containing electric translating devices. Adesirable characteristic of the switch is its rapidity of action bywhich a long closure of the operating switch will do no damage to thecontrolling or controlled apparatus, which is accomplished by aninstantaneous opening 01' closing of the circuit of the translatingdevices. 'A further characteristic is that the electromagnetic controlis 1 established by the same source of electro-motive force that is usedto control the translating devices. The switch may be adjusted to openor close the remote control circuits, as desired.

In carrying out my invention I provide an electro-magnetic switchprovided with a retractile armature carrying a knife-edged latch andmount a spring-controlled trigger on aplane transverse to the knife edgewith a front and back stop adapted for inclusion in the control circuitalternatively, accordingly as the switch is to control an opening orclosing movement of the translating device circuit. The apparatusoutlined is extremely 0 sensitive in providing a reliable hair triggerrelease which instantaneously opens the circuit and puts beyondpossibility damage to the translating device or coils by a prolongedaction of the circuit controller.

My invention, therefore, consists of a remote controlled devicegoverning circuits containing electric translating devices and adaptedfor opening or closing the same. The invention is primarily intended foruse in connection with radio receiving sets rectified or amplified by avacuum tube to simplify their control from a distant point or points andtherefore conduce toward conserving the energy of the batteries.

The invention will be more fully understood in connection with theaccompanying drawings and the novel features will be specificallyindicated in the appended claim.

In the drawings: Figure 1 illustrates the system as applied to a radioreceiving set as adapted for instantaneous opening by remote control ofthe circuit of the battery controlling the vacuum tube or tubes.

Figure 2 illustrates the system as modified by a mere shift of onecircuit lead to permit closing control of the translating circuits.

Figure 3 is an elevation on a plane at right angles to Figures 1 and 2of the electro-magnet.

Figure 4 is a sectional view in part elevation on the plane 44 of Figure2.

Referring now in detail to the drawings,

1 represents a radio receiving set, the terminals of which are indicatedat A+, A, and in which in normal operation an A-battery of a few voltswith a rheostat controls a rectifying vacuum tube containing a heatingfilament. 2 represents one control dial of the receiving set, any numberof which may be employed with corresponding tubes for amplifyingpurposes. A set of wires 3, 4 lead to a distant point where remotecontrol is desired, which may be any desired distance and includes acircuit closer 5. An A-battery is located adjacent the receiving set ormay be at a distance from the same if more convenient, as in a closetshelf where it will be out of the way. The circuit of the A-battery maybe of any proper voltage to heat the vac- 39 uum tube filament forrectification of the high frequency radio impulses and amplification bythe usual higher voltage B-battery. In Figure 1 is shown theelectro-magnetic switch comprising an electro-magnet 6 mounted upon abase and cooperating with a rectractile armature 7 mounted on an elasticblade spring 8 carried by an angle bracket 9 secured to the base. Theblade spring 8 has a free end spaced from the armature and forms a verythin line contact with a latch strip 10 carried by a leaf spring 11anchored in an angle bracket 12 secured to the base. The leaf spring 11is bent away from the latch piece 10 so as to form an elastic abutmentto engage a front contact 13 with suflicient yield to permit readylatching when the operator raises the latch to engage the knife edge 8of the armature. A back stop let is mounted in the plane of the latchwhich is engaged in its release position. v A binding post 16 isprovided for the one terminal of the magnet and another binding post 16ais in electrical connection with the back stop 14 to which the positivelead 17 of the controlled circuit may be transferred to adapt the devicefor closing relation to the controlled circuit. Two other binding posts18, 19. are provided, the. former leading to one terminal of the batteryand a W connecting with the bracket 12, and the post 19 forming oneterminalof the electro-mag-* net. The other pole of the battery leads.to .1

the negative side of the A-battery'by wire I Leads 3, 4 lead any desireddistanceto-thecircuit controller 5. As thus described, the controlswitch is set by lifting the latch memher-10 to en age the knife edge atthe top of the spring 8 which sets the electroemagnetic switch for opencircuiting the receiver and ;when the switch 5 is closed no matter howlong it'may be he'ldclosed the armature 7 is instantlydrawn overtheknife-edged spring, 8 and latch is shifted from front stop 13 tobackstop, 14 thus simultaneously breaking y the translating circuit andthe circuit through the electro-magnets of the electro-magnetic switch.Thenormal circuit is from-the neg-, ative side of the i l-battery isig.-1 over the lead 20,- battery post 18, armature 11, back-stop. :13,post 16, lead 17 to the positive side of the radiol hiscircuit does notinclude the coils of the nia-gnet'but by closing the remote controlswitch 5 the ba ter}: is placed in the circuit by way of frontstop 13toone side of the" asricoils andtby way of vbinding post 19 andx distantlead i to-the switch, thus eifecting opening of the circuit.

In Figure 2 the latch is shown in its on position and the positive lead17 from the re-- 40%;ceiving set goes to the binding 'post-16a'and thereceiving set is put in closed circuit relationto the Av-battery; ifthelatch is set, the circuit will be opened. When the switchi5a isoperated'the magnet will release thelatch iiand close the battery to theradio set. i I have described the invention as primarily intended foruse in connection wit-hradio receiving?- sets, but it is of efficientapplication to other types of :circuits. where distant control is fiine-eded, such as burglar alarms or-other types of electrictranslatingdevices where remote control isdesired.

tures, the rapidity of actuation prevents burning out of theelectro-magnets by reason of the quickness of opening of the circuit andas prolonged pressure of the circuit controller has no effect on thecontrolled circuits the switch becomes fool-proof from carelessmanagement:

Having thus-described my inventionewhat I claimas new and desire tosecure by Letters Patent is:

A switch comprising "a 'base, an electromagnet mounted upon said base, aretractile armature for the electro-magnet, an angle bracketsecuredto-saidbase adjacent to the electro-magnet, a blade springhavingan end secured to the: angle bracket and being fixed to thearmature, said bladespring having its: opposite end free andd1sposed-inspaced rela-"- tion-with respect to the armature, a secondangle bracket securedto the ba-se at an incli nation,a leaf springsecured to: the second an le brackety a :latch strip secured to "theleaf spring intermediate itsendsand extend-' ing beyond thefree end ofthe leaf springtd 2 be received by the free end ofthe blade springforcontacting engagement therewith where by the latch strip'is held undertension by t said bladeaspring, said leaf spring havingits free endspaced from the latch strip, a contact arranged in .thepathof-the freeend of the leaf spring,*and a contact arranged in the-- path of thelatch strip. In testimony whereof FRANKLIN J. SORELL; .7

The latching mechanism described is an i exceedingly sensitive one asthe movement of fi ncthe armature a microscopic distance against aspring pressure at right angles to the move-* ment gives a hair triggereffect of remarkable sensitivenessn Of special value in reinote controldevices is the potential drop on filong circuit wires, reducing theampera'ge to an extent that :very weak, magnetization.

exists in the cores ofthe magnetic releasing devlc'eh Vfith my device,however, this dis- I ability is offset by the. sensitiveness of-ithemechanism, In addition to the sensitive fea- I afiix my s1gn-aturer- IOU

